6KJL

Xylanase J from Bacillus sp. strain 41M-1

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history. 


Literature

Increase in the thermostability of GH11 xylanase XynJ from Bacillus sp. strain 41M-1 using site saturation mutagenesis.

Takita, T., Nakatani, K., Katano, Y., Suzuki, M., Kojima, K., Saka, N., Mikami, B., Yatsunami, R., Nakamura, S., Yasukawa, K.

(2019) Enzyme Microb Technol 130: 109363-109363

  • DOI: 10.1016/j.enzmictec.2019.109363
  • Primary Citation of Related Structures:  
    6KJL, 6KKA

  • PubMed Abstract: 

    • GH11 xylanase XynJ from Bacillus sp. strain 41M-1 has a β-jellyroll fold composed of eight β strands with a deep active-site cleft. We hypothesized that the thermostability of XynJ will increase if the flexibility of the β strands in the jellyroll structure is decreased without impairing activity ...

    GH11 xylanase XynJ from Bacillus sp. strain 41M-1 has a β-jellyroll fold composed of eight β strands with a deep active-site cleft. We hypothesized that the thermostability of XynJ will increase if the flexibility of the β strands in the jellyroll structure is decreased without impairing activity. To verify this hypothesis, we introduced random mutations into Tyr13-Arg104 and Gly169-Tyr194, both of which are located in the β-jellyroll fold of XynJ, to construct a site saturation mutagenesis library. By screening 576 clones followed by site saturation mutation analysis of Thr82, T82A was selected as the most thermostable variant. In the hydrolysis of beechwood xylan at pH 7.8, the temperatures required to reduce initial activity by 50% in 15 min were 61 °C for the wild-type XynJ (WT) and 65 °C for T82A. The optimum hydrolysis temperatures were 60 °C for WT and 65 °C for T82A. There was little difference in the k cat and K m values and the pH dependence of activity between WT and T82A. Crystallographic analysis of WT and T82A revealed that thermostabilization by the T82A mutation might result from the removal of unfavorable van der Waals interactions. Thus, a highly thermostable XynJ variant was generated without impairing activity using this mutation strategy.

    Organizational Affiliation: 

    Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan. Electronic address: yasukawa@kais.kyoto-u.ac.jp.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Endo-1,4-beta-xylanaseA, B328Bacillus sp. 41M-1Mutation(s): 0 
Gene Names: xynJ
EC: 3.2.1.8
UniProt
Find proteins for Q9RC94 (Bacillus sp. 41M-1)
Explore Q9RC94 
Go to UniProtKB:  Q9RC94
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9RC94
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE
Download Ideal Coordinates CCD File 
E [auth A],
F [auth A],
P [auth B]		4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N		 Ligand Interaction
MPD
Query on MPD
Download Ideal Coordinates CCD File 
G [auth A],
H [auth A],
Q [auth B],
R [auth B],
S [auth B],
G [auth A],
H [auth A],
Q [auth B],
R [auth B],
S [auth B],
T [auth B]
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N		 Ligand Interaction
GOL
Query on GOL
Download Ideal Coordinates CCD File 
I [auth A],
J [auth A],
K [auth A],
L [auth A],
M [auth A],
I [auth A],
J [auth A],
K [auth A],
L [auth A],
M [auth A],
U [auth B],
V [auth B],
W [auth B],
X [auth B],
Y [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
CA
Query on CA
Download Ideal Coordinates CCD File 
C [auth A],
D [auth A],
N [auth B],
O [auth B]		CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 125.94α = 90
b = 125.94β = 90
c = 318.57γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
MOLREPphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Japan Science and TechnologyJapan--

Revision History  (Full details and data files)

  • Version 1.0: 2019-09-04
    Type: Initial release